I had just finished giving a talk on the Information Revolution when a young man approached me and said: "What I really want is a brain implant so that I can move massive amounts of information rapidly and painlessly in and out of my head." "You mean so that you can download and upload information without going through the slow eyeball, mouth and ear interfaces?" I countered. "Yes. Isn't that a great idea?" he replied, much encouraged by my reaction. "No. It's a lousy idea," I said, "...unless you are talking about sensor or effector chips," and went on to explain.

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